Manhole for conduits.



No. 766,581. PATENTED AUG. 2, 1904. H. G. BAKER.

MANHOLE FOR GONDUITS.

APPLICATION FILED JAN. 8, 1904.

N0 MODEL.

A TTORNEYS UNTTED STATES Patented August 2, 1904.

HUGH C. BAKER, OF NEW YORK, N. Y.

MANHOLE FOR CONDUITS.

SPECIFICATION forming part of Letters Patent No. 766,581, dated August2, 1904.

Application filed January 8, 1904. Serial No. 188,164. No model.)

To III/7 11-71mm it nmq concern:

Be it known that I, HUGH (l. BAKER, a subject of the King of GreatBritain, residing at New York, in the county of New York and State ofNew York, have invented certain new and useful Improvements in Manholesfor Conduits, of which the following is a specification, such as willenable those skilled in the art to which it appertains'to make and usethe same,

The object of this invention is to provide a manhole for electrical andother conduits of improved construction, whereby the said constructionis simplified and the cost thereof materially reduced; and the inventionconsists of a manhole constructed as hereinafter described and claimedand of the means or material employed in the construction of themanhole.

The invention is fully disclosed in the following specification, ofwhich theaccompanying drawings form a part, in which the separate partsof my improvement are designated by suitable reference characters ineach of the views, and in which Figure 1 is a plan view of a manholemade according to my invention, part of the cover being removed; Fig. 2,a partial section thereof on the line 2 2; Fig. 3, a plan view of acorner and end brick or block used in the construction of the bodyportion of the manhole: Fig. a, a similar view of one of the side bricksor blocks used in the construction of the manhole; and Figs. 5 and 6 arebottom plan views of side and corner bricks or blocks employed in thecover of the manhole.

In the practice of my invention as shown in the drawings 1 provide amanhole the body portion of which is composed of separate layers a ofbricks or blocks molded from concrete or other suitable material and ofa form or construction hereinafter described, and a cover 6 composed oftransverse I-beams b and longitudinally-arranged end T-beams Z),together with corner bricks or blocks (1" and side bricks or blocks If,said bricks or blocks .7) and 7) being also molded from concrete orother suitable material.

The separate layers 11 of which the body portion of the manhole iscomposed. each con- In the form of construction shown my im I provedmanhole is substantially elliptical in horizontal section, the endcurves being the same as the side curves, but at the corners, at eachend, are abrupt curves 0, and the end and corner bricks or blocks (6 arecurved at one end to produce the curves 0. The end bricks or blocks (1and the side bricks or blocks (15 in the separate layers are allprovided with side grooves 11', whereby top and bottom flanges 11" areformed, and these flanges a facilitate the handling of the bricks orblocks and also reduce the amount of material necessary in the formationthereof. The bricks or blocks a and a are also all provided with top andbottom grooves 11", which are filled with cement or are adapted toreceive cement, and at the opposite ends of the manhole are openings (Zthrough which the conduits are passed in the usual manner and anydesired number of which may be employed, and in the form of constructionshown 1 provide hooks (7 which are suspended from between two of thelayers of the bricks or blocks and are intended to serve as supports forthe cables.

The cover of the conduit is provided with the usual central openingaround which is placed an annular plate or collar (3 over which isplaced a sleeve M, which is closed by the usual cap The side bricks orblocks of the cover are supported by the I-beams b and in place of theI-beams l) inverted T-beams may be employed, if desired, and the cornerbricks or blocks 6 of the cover are supported by the I-beams 7)" and thebeams If, which are also inverted, and the inner ends of the beams I)are supported by the beams 5 The end bricks or blocks 1/ of the coverare provided with grooves I)" in their under sides similar to thegrooves a in the top layer a of the bricks or blocks which make up thebody of the manhole, and said end bricks or blocks 1) of the cover arealso preferably hollowed out at the bottom or provided with chambersalso hollowed out or provided with recesses 72?, similar to those in theend bricks or blocks 7)" of the cover, and are also provided withgrooves Z which correspond with the grooves a in the bricks or blocks ofthe top layer of the body portion of the manhole and are intended forthe same purpose. I

By forming the grooves 60* in the bricks or blocks from which the bodyportion of the manhole is made the conduit-cables may be carried aroundone side or both sides of the manhole in said grooves, and the hooks (Zmay be made of any desired shape or length, so as to support saidcables, and a greater space is thus provided within-the manhole.

It will be apparent that a manhole of any desired dimensions may beconstructed in this manner, and although the bottom of the manhole isnot shown it will be understood that the said bottom may be formed inthe usual or any desired manner.

Having fully described my invention, what 1 claim as' new, and desire tosecure by Letters Patent, is-

1. A manhole, the body portion of which is composed of separate layersof bricks or blocks having grooves in the sides thereof and laterallydirected top and bottom flanges and adapted to be reversed in theseparate layers so as to break joints, substantially as shown anddescribed.

2. A manhole, the body portion of which is composed of separate layersof bricks or blocks having grooves in the sides thereof and laterallydirected top and bottom flanges and adapted to be reversed in theseparate layers so as to break joints, said bricks or blocks being alsoprovided with top and bottom grooves adapted to receive cement,substantially as shown and described.

3. A cover for manholes, comprisingtransplaced between the transversebeams, and two end bricks or blocks at each end supported by thetransverse beams and the longitudinallyarranged end beams, substantiallyas shown and described.

4:. A cover for manholes, comprising trans verse beams andlongitudinally-arranged end beams the inner ends of which are supportedby the transverse beams, side bricks or blocks placed between thetransverse beams and two end bricks or blocks at each end supported bythe transverse beams and the longitudinallyarranged end beams, saidbricks or blocks being hollowed out on their under sides and reinforcedwith metal, substantially as shown and described.

5. A-manhole, the body portion of which is composed of separatehorizontal layers of bricks or blocks, each of said layers consisting oftwo different styles of bricks or blocks, all of said bricks or blocksbeing provided with top and bottom side flanges, substantially as shownand described.

6. A manhole, the body portion of which is composed of separatehorizontal layers of bricks or blocks, each of said layers consisting oftwo different styles of bricks or blocks, all of said bricks or blocksbeing provided with top and bottom side flanges, and with top and bottomgrooves, I substantially as shown and described.

In testimony that I claim the foregoing as my invention 1 have signed myname, in presence of the subscribing witnesses, this 7th day of January,1904.

HUGH C. BAKER.

Witnesses:

F. A. STEWART, C. J. KLEIN.

